TREATING AGENT FOR METAL SURFACE, METHOD OF TREATING METAL SURFACE, AND SURFACE-TREATED METALLIC MATERIAL

摘要

A treating agent for metal surfaces which gives a coating film excellent in conductivity and corrosion resistance and in adhesion to topcoat films to be formed thereon. The treating agent comprises an aqueous dispersion obtained by reacting an epoxy compound with an ionomer resin in an aqueous dispersion form obtained from an ethylene/unsaturated carboxylic acid copolymer containing 10 to 30 wt.% unsaturated carboxylic acid units by neutralizing at least 30% of the carboxyl groups of the copolymer with potassium ions.